Matches in SemOpenAlex for { <https://semopenalex.org/work/W2005694414> ?p ?o ?g. }
- W2005694414 abstract "Glutathione (GSH), the major cellular protectant against reactive oxygen and nitrogen species, is compartmentalized in a cytosolic (c) and a mitochondrial (mt) pool. We investigated how c-GSH and mt-GSH are differentially affected by endogenously produced nitric oxide (NO). Microglial cell line (N9) cultures were immunostimulated with lipopolysaccharide/interferon-gamma to elicit the inducible isoform of NO synthase (iNOS). Despite a significant reduction in total GSH, the mt-GSH remained nearly unaffected by iNOS-mediated NO production. To investigate possible consequences of GSH depletion on the mitochondrial membrane potential, we used buthionine sulfoximine (BSO) to reduce separately the c-GSH, whereas ethacrynic acid (EA) was applied to deplete both mt-GSH and c-GSH. The mitochondrial membrane potential was more vulnerable to NO exposure in EA-pretreated cultures than in BSO-pretreated cultures, indicated by a potentiated release of tetramethylrhodamine from mitochondria into the cytosol. To relate the EA-mediated decrease in mitochondrial membrane potential to the oxidant buildup after GSH depletion, we loaded the cells with the oxidant-sensitive fluorochrome 2',7'-dihydrodichlorofluorescein (DCF) diacetate. EA treatment caused an increase in DCF fluorescence over time that was potentiated when the iNOS expression was stimulated. Inhibition of NO production abolished this effect. We conclude that endogenous NO production in microglial cells does not compromise the mt-GSH pool which, in turn, might explain the ability of these cells to combat high-output NO production." @default.
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- W2005694414 date "2003-02-01" @default.
- W2005694414 modified "2023-10-14" @default.
- W2005694414 title "Cytosolic and mitochondrial glutathione in microglial cells are differentially affected by oxidative/nitrosative stress" @default.
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- W2005694414 doi "https://doi.org/10.1016/s1089-8603(02)00146-5" @default.
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